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2012 BMW M5
Diesel M5 will have less horsepower than gas version, but loads of torque

In Europe, the diesel engine has been a staple in automobiles due to its fuel efficiency and the price of gasoline. However, there are relatively few diesel cars in the U.S. even though the engines are common in heavy-duty trucks.

BMW has confirmed that it will be producing the first diesel vehicle to ever wear the M badge in the company's performance vehicle line. BMW will be producing a diesel-powered M5 next spring that will feature three turbochargers. The same engine will also be used in other BMW vehicles like the X5 and X6 crossovers.

The Detroit Bureau reports that the vehicle will be called the 550dM or the 550dXM with the latter featuring an all-wheel drive system. The Detroit Bureau also reports that the diesel engine would be a version of the current straight-six diesel beefed up for M duty.

If the engine is in fact a straight six, it will reportedly use one small turbo to build boost for launch, while two larger turbos will come online for extra mid-range and high-end power.

The publication also claims that sources have told it that the 550dM will make "slightly less" power than the gasoline M5's rated 560 HP output with final numbers expected to be in the 500 to 550 HP range. However, the torque output will be massive at up to 650 lb-ft. The copious torque is pointed to as the reason for the all-wheel drive option.

"You have to go to all-wheel-drive,” explained one senior BMW official, “otherwise you’ll be spinning your tires all day."

GM will be producing a diesel version of the Cruze as well, though it is far from a performance vehicle. However, this shows that the trend in using diesel engines in the U.S. is growing.

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RE: Drooooool! Going to start saving now
By Brandon Hill on 8/18/2011 7:15:34 PM , Rating: 2
The E39 is about 300 pounds lighter than the F10

RE: Drooooool! Going to start saving now
By Reclaimer77 on 8/18/2011 7:48:33 PM , Rating: 1
Do you even understand my point that M5's keep getting heavier and heavier? I'm not sure why you're fixated so much on that one statement I made and taking to completely out of context. Stop trolling!

And I love how you so easily dismiss a 300 pound gain when it comes to a performance vehicle. Tell you what Brandon, carry around 300 pounds for a day and tell me how "light" it is.

By Brandon Hill on 8/18/2011 8:43:04 PM , Rating: 2
Of course I understand your point, and I'm not trolling.

All I'm saying is that relatively speaking, considering that all vehicles have gotten heavier in the past decade due to added safety/features/emissions controls, a 300 pound increase for a midsize sedan is not all that bad all things considered.

So my point still stands that the E39 was no lightweight in its day, just like the F10 is no lightweight today. It might have been nimble on the track, but it was not a light vehicle by any means. I don't mean it in a bad way, just stating facts. Everyone just makes up for it today by adding a s**tload more power across the board compared to their counterparts from a decade ago.

Anyway, for comparison:

2000 BMW E46 M3 -- 3,415 lbs
2011 BMW E92 M3 -- 3,704 lbs

2000 Audi B5 S4 -- 3,338 lbs
2011 Audi B8 S4 -- 3,638 lbs

2000 Mercedes E55 -- 3,680 lbs
2011 Mercedes E63 -- 4,084 lbs

Anyway, no need to get your panties in a bunch. We're all friends here ;)

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